We live in aleigh, North Carolina. Our r
Ask
We live in aleigh, North Carolina. Our rent, groceries, utilities, and medicines are completely covered every month.
We have $500 in extra monthly surplus to allocate toward our two remaining debts:
1. Credit Card: $3,200 balance at 22.9% AP (minimum payment $85/month).
2. Auto Loan: $8,500 balance at 7.2% AP (minimum payment $260/month).
Total monthly debt budget available is $845 ($85 + $260 + $500 surplus).
Could you guide us on:
1. Confirming living essentials are covered as the baseline premise.
2. A structured comparison table of Avalanche vs Snowball (stating which debt extra goes to first, total months to debt freedom, and total interest paid).
3. The trade-offs of both strategies without picking one for us.
4. Explaining that finance charge is not the ranking key (citing statement AP only).
Answer
ent, groceries, utilities, and medicines are covered, so this is a repayment comparison, not a crisis ladder.
**Premise check.** Living essentials are covered first; the $845/month is what's left over for debt service ($85 minimum on the card + $260 minimum on the auto loan + $500 extra).
**Avalanche vs Snowball.** Both routes put the extra toward the Credit Card first — it is both the higher-AP debt (22.9%) and the smaller balance ($3,200 vs $8,500), so the two strategies agree this month. Months and total interest are the same on both; nothing is saved by switching.
| Strategy | Extra goes first | Total months | Total interest |
| --- | --- | --- | --- |
| Avalanche | Credit Card 22.9% | 15 | $708.86 USD |
| Snowball | Credit Card $3,200 | 15 | $708.86 USD |
Source: this turn's `payoff.py` ok:true stdout; monthly compounding assumed, model not a prediction. The last payment on the Auto Loan is $578.86, and on the Credit Card is $487.56 — both are smaller than a full month because the balance runs out mid-cycle.
**Trade-offs (the part that still matters if the numbers ever diverge).** Avalanche ranks debts by statement AP and minimizes dollars paid in interest over the life of the plan. Snowball ranks by balance and clears one account sooner, which some households use as a morale marker — one fewer minimum payment on the books. In your case the two answers coincide; on a future debt set where the smaller balance is *not* the higher AP, the choice becomes "save interest" vs "close one account first."
**Why statement AP, not finance charge, is the ranking key.** A finance charge is just *balance × that debt's own rate* applied for one billing period — it changes month to month as the balance changes, so it cannot tell you which debt is structurally more expensive to carry. The rate printed on the statement (22.9% on the card, 7.2% on the auto loan) is fixed by contract and is the only figure that stays comparable across the two accounts. I did not compute a monthly interest figure by hand; the $708.86 total above comes from the script's amortization, not from a back-of-envelope multiplication.
**Limits.** This is a model with your stated minimums and a flat $500 extra every month for 15 months; if income, minimums, or the extra amount shift, the months and interest shift too. It is not a forecast and not advice to refinance, consolidate, or change payment due dates.
Source: this turn's `payoff.py` ok:true stdout.